(19)
(11) EP 4 228 544 A1

(12)

(43) Date of publication:
23.08.2023 Bulletin 2023/34

(21) Application number: 21791021.5

(22) Date of filing: 05.10.2021
(51) International Patent Classification (IPC): 
A61C 7/08(2006.01)
(52) Cooperative Patent Classification (CPC):
A61C 7/08
(86) International application number:
PCT/IB2021/059119
(87) International publication number:
WO 2022/079544 (21.04.2022 Gazette 2022/16)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 13.10.2020 US 202063091144 P

(71) Applicant: 3M Innovative Properties Company
Saint Paul, Minnesota 55133-3427 (US)

(72) Inventors:
  • YU, Ta-Hua
    Saint Paul, Minnesota 55133-3427 (US)
  • PERCHA, Pamela A.
    Saint Paul, Minnesota 55133-3427 (US)
  • GEISLER, Karl J.L.
    Saint Paul, Minnesota 55133-3427 (US)
  • BROYLES, Bruce R.
    Saint Paul, Minnesota 55133-3427 (US)

(74) Representative: Vossius & Partner Patentanwälte Rechtsanwälte mbB 
Siebertstraße 4
81675 München
81675 München (DE)

   


(54) METHODS OF CONTROLLING HAZE IN ORTHODONTIC APPLIANCES INCLUDING SEMI-CRYSTALLINE POLYMERS